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TM 11-5820-890-30-5
3-17. OPERATIONAL CHECK. Continued
Step 4. RCV SC 4.8K CHECK.
Action
Response
a. Set PTT: OFF
a. No response.
STIMULUS: 4
RESPONSE: 1
BASEBAND: 2.
b. Set PTT: REF.
b. Scope CHAN A displays a 9.5 to 10.5 V
p-p, 2390 to 2410 Hz square wave. If not,
the RT is bad. See chapter 2.
c. Set RESPONSE: 2.
c. Scope CHAN A displays a 9.5 to 10.5 V
Set PTT: REF.
p-p, 4790 to 4810 Hz square wave. If not,
the RT is bad. See chapter 2.
Step 5. TRANSMIT AD2 CHECK.
Action
Response
a. Set FCTN GEN TRIGGER: CONT
a.
Scope CHAN B and frequency counter
CAL: FCTN GEN
will display function generator calibration.
LEVEL: 350 mV p-p (340 to 360 mV p-p)
FREQ: 2400 Hz (2390 to 2410 Hz)
FUNCTION: SINE
CAL: OFF.
b. Set REF RT and UUT RT: DATA: AD2
b. No response.
STIMULUS: 1
RESPONSE: 3
BASEBAND: 4.
c. Set PTT: UUT.
c. Scope CHAN A displays a 1.5 to 2,5 V
p-p, 2390 to 2410 Hz sine wave (slightly
distorted). If not, the RT is bad. See
chapter 2.
Step 6. RECEIVE AD2 CHECK.
Action
Response
a. Set PTT: OFF
a. No response.
STIMULUS: 3
RESPONSE: 1
BASEBAND: 5.
b. Set PTT: REF.
b. Scope CHAN A displays a 1.5 to 2.5 V
p-p, 2390 to 2410 Hz sine wave (slightly
distorted). If not, the RT is bad. See
chapter 2.
3-33
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